javascript - jsPlumb 使用点击而不是拖动来连接元素

Question

我正在尝试使用 jsPlumb在测验中将问题与答案联系起来。我有大部分工作期望我希望能够单击一个问题，然后单击一个答案，而不是从一个端点拖到另一个端点。这是因为在触摸设备上拖动是乏味的。这可能吗？

Here is my jsbin with the dragging working

这是我正在使用的 jquery。

$(document).ready(function () {  
   var targetOption = {
        anchor: "LeftMiddle",
        isSource: false,
        isTarget: true,
        reattach: true,
        endpoint: "Rectangle",
        connector: "Straight",
        connectorStyle: { strokeStyle: "#ccc", lineWidth: 5 },
        paintStyle: { width: 20, height: 20, fillStyle: "#ccc" },
        setDragAllowedWhenFull: true
    }

    var sourceOption = {
        tolerance: "touch",
        anchor: "RightMiddle",
        maxConnections: 1,
        isSource: true,
        isTarget: false,
        reattach: true,
        endpoint: "Rectangle",
        connector: "Straight",
        connectorStyle: { strokeStyle: "#ccc", lineWidth: 5 },
        paintStyle: { width: 20, height: 20, fillStyle: "#ccc" },
        setDragAllowedWhenFull: true
    }

    jsPlumb.importDefaults({
        ConnectionsDetachable: true,
        ReattachConnections: true
    });


    jsPlumb.addEndpoint('match1', sourceOption);
    jsPlumb.addEndpoint('match2', sourceOption);
    jsPlumb.addEndpoint('match3', sourceOption);
    jsPlumb.addEndpoint('match4', sourceOption);
    jsPlumb.addEndpoint('answer1', targetOption);
    jsPlumb.addEndpoint('answer2', targetOption);
    jsPlumb.addEndpoint('answer3', targetOption);
    jsPlumb.addEndpoint('answer4', targetOption);
    jsPlumb.draggable('match1');
    jsPlumb.draggable('answer1');
});

Answer 1

我认为如果你不需要 draggable，那么你不应该使用它，并使用正常的 click=connect 方法。

这是一个例子:

http://jsbin.com/ajideh/7/

基本上我做了什么:

//current question clicked on
var questionSelected = null;
var questionEndpoint = null;

//remember the question you clicked on
$("ul.linematchitem > li").click( function () {
  
    //remove endpoint if there is one
    if( questionSelected !== null )
    {
        jsPlumb.removeAllEndpoints(questionSelected);
    }
  
    //add new endpoint
    questionSelected = $(this)[0];
    questionEndpoint = jsPlumb.addEndpoint(questionSelected, sourceOption);
});

//now click on an answer to link it with previously selected question
$("ul.linematchplace > li").click( function () {
  
    //we must have previously selected question
    //for this to work
    if( questionSelected !== null )
    {
        //create endpoint
        var answer = jsPlumb.addEndpoint($(this)[0], targetOption);
      
        //link it
        jsPlumb.connect({ source: questionEndpoint, target: answer }); 
        //cleanup
        questionSelected = null;
        questionEndpoint = null;
    }
}); 

当您单击问题列表元素时 - 它会添加端点，当您单击答案元素时 - 它还会添加端点并将其与先前选择的问题连接起来。

我相信这就是您想要做的？

附言作为旁注，为了让这对用户来说更直观，首先让问题的端点可见，这样用户就会知道要做什么——点击。选择问题后，可用的答案端点会弹出提示用户应该点击下一步的位置。